Effect of Synthesis Mode and Ni Particle Size on Microstructural Aspects and Hardness Properties of Combustion-Synthesized NiTi

Arman Khobzi; Mandana Adeli; Ashkan Sabour‑Bagherzadeh; Ashkan Arab; Hooman Abedi

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자료유형: 학술저널

저자정보: Arman Khobzi (The University of British Columbia) Mandana Adeli (Iran University of Science and Technology) Ashkan Sabour‑Bagherzadeh (Iran University of Science and Technology) Ashkan Arab (Iran University of Science and Technology) Hooman Abedi (Iran University of Science and Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.5

발행연도: 2021.1

수록면: 1,273 - 1,281 (9page)

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NiTi intermetallic compound was fabricated via two modes of the combustion synthesis process, namely, thermal explosion(TE) and self-propagating synthesis (SHS). The effect of combustion synthesis mode as well as Ni particle size on themicrostructure and microhardness of the final products was investigated. The phases in the products were determined usingXRD technique, and microstructural investigations were performed using optical as well as SEM-EDS in order to make acomparison between microstructural evolutions in each mode, other conditions being constant. The analyses showed thatthe desired B2(NiTi) was successfully formed as the primary phase in all samples, and no unreacted Ni or Ti powders werepresent. The main secondary phase was NiTi2which was invariably present in all samples; however, the percentage as wellas the morphology of the detrimental NiTi2phase was found out to be controllable by the mode of combustion as well asNi particle size. A comparison between the two modes revealed that samples produced by TE showed coarse dendritesin the microstructure; they also presented higher average microhardness values. The SHS-synthesized samples exhibitedmicrostructures similar to those observed in heat-treated and homogenized NiTi obtained from methods such as vacuum arcremelting and vacuum induction melting, and contained finely dispersed NiTi2particles. It was shown that a decrease in Niparticle size presented a grain refining effect on NiTi2in both modes.

#Intermetallics · Powder metallurgy · Combustion synthesis · NiTi · Microstructure · Hardness

참고문헌 (37)

참고문헌 신청

K. Otsuka / 1999 / Intermetallics 7:511

N. Shayesteh Moghaddam / 2018 / Mater. Sci. Eng. A 724:220

M. Saugo / 2017 / Mater. Chem. Phys 190:136

J. Mohd Jani / 2014 / Mater. Des 56:1078

A. Bansiddhi / 2008 / Acta Biomater 4:773

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